The more you know about chemistry the more you will be able to predict, control and manipulate the world around you. Since human kind learned to control fire, we have yearned to understand why the world behaves the way it does. Chemistry is often referred to as the “central science,” because of its pivotal role in the study of all other sciences.
Subjects: Chemistry
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Bonding: Atomic Glue
Lesson 2 is a crucial lesson because it takes you from discussing the elements in isolation to exploring how these elements interact with each other at the atomic level, and how chemists, including you, can predict these interactions. As you were introduced, or most likely reintroduced, to the elements in the periodic table, you learned the important role protons play in defining one element from the next. As we move our focus to bonding in this lesson you will shift your focus to the electrons, since they define how elements interact with each other.
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All About Chemical Bonding – Ionic
Who would have thought that two dangerous elements, such as sodium and chlorine, when bonded together, could create a new and harmless compound known as table salt? In this program we take a fascinating look at ionic bonding. Viewers will discover how and why bonding occurs, the Gilbert Lewis theory, the importance of the valence shell, the periodic table and its elements, and the common properties of ionic compounds. Viewers are also introduced to important terms of ionic bonding including electronegativety, Pauling scale, and ionization energy. With the assistance of animated graphics, ionic bonding is brought to life.
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All About Chemical Bonding – Covalent
In this program we look at covalent bonding. A short summary as to why bonding occurs is presented before viewers witness how electrons are shared in covalent compounds. We discuss how the geometry of molecules is predicted by the Valence Shell Electron Pair Repulsion (VSEPR) theory, the two types of weak forces of attraction between molecules, dipole interactions and dispersion forces, and covalent network solids which are formed from carbon atoms. Examples of network solids are addressed including diamond, graphite and fullerenes. With the assistance of animated graphics, this program provides viewers with a wonderful introduction to chemical bonding.
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All About Chemical Bonding – Metallic
Before delving into metallic bonding, viewers are provided with an overview of why bonding occurs, learn about Gilbert Lewis’s Octet rule and why the elements in the periodic table are categorized. We discuss the importance of the ‘sea’ of electrons and how this explains the many properties of metal including their shine, and their ability to conduct electricity and heat. We are then introduced to the different types of geometric arrangements including body-centered cubic, face-centered cubic and hexagonal close-packing. With the assistance of animated graphics, join us as we bring metallic bonding to life.
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Understanding Electrolysis
Electrolysis has important applications in everyday life – from the batteries in our portable devices to the production of common metals such as aluminum. Featuring lab demonstrations, engaging graphics and clear explanations, this program looks at the chemistry of electrolysis. Two types of electrochemical cells are introduced – galvanic cells and electrolytic cells – and compared. The program discusses the industrial applications of electrochemistry, including brine electrolysis, aluminum production, electroplating and anodizing. Viewers are also introduced to the many applications of rechargeable batteries, such as lead-acid, Ni-MH and Li-ion batteries before concluding with an introduction to Faraday’s First Law of Electrolysis and stoichiometric calculations.
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Detecting Blood With Luminot
How can blood stains be made to fluoresce under ultraviolet light, and what can they tell us about a crime scene?
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What is a DNA Fingerprint?
How is a DNA fingerprint created and what does it show? The forensics experts at Trent University help us unravel the science of DNA analysis.
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Lifting Fingerprints With Superglue
Forensic investigators have a secret weapon in their quest for fingerprints – cyanoacrylate, commonly referred to as ‘superglue’!
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Why Does Salt Melt Ice?
There is some remarkable chemistry at work when ice is exposed to salt. The ice melts, but why?